The San Francisco 49ers have reached a massive 10-year naming rights extension with Levi's that will keep the company's name on the team's stadium through the 2043 season.

The deal got done even though the two sides still had 10 years remaining on a 20-year, $220 million deal that they agreed to back in July 2013. 

The two sides added $170 million to the agreement.

"I think this speaks to the partnership with the 49ers and Levi's," 49ers President Al Guido said. "I think it's unlikely you could find a deal that's been extended at this early stage at this price point."